• Automatic Capacitance & Tan Delta test set Model ACTS-12K Plus is a instrument designed to conduct Power Factor tests on electrical insulation.
• The test set is capable of automatically measuring the insulation Power Factor of multi-terminal equipment at voltages ranging from less than 1kV up to10 kV.
• Being equipped with two measuring leads, the test set can measure all the quantities associated with multi-terminal electrical power equipment.
• In addition to measuring the Capacitance and Power Factor of insulation, the test sets can measure the excitation current of transformers and other equipments.
• Tan Delta Test Sets operate on the transformer ratio arm bridge principle. The current from the device under test is compared to the current of an internal reference capacitor.
• The residual of this comparison is measured and resolved into in-phase (watt loss) and quadrature current components.
• The test voltage and total specimen current are also measured.

From these measured quantities, Power Factor and Capacitance are calculated and displayed along with the test voltage, current and power losses.